must while
Regular verb: while - whiled- whiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must while
you must while
she must while
we must while
you must while
they must while 	I must be whiling
you must be whiling
she must be whiling
we must be whiling
you must be whiling
they must be whiling	I must have whiled
you must have whiled
she must have whiled
we must have whiled
you must have whiled
they must have whiled	I must have been whiling
you must have been whiling
she must have been whiling
we must have been whiling
you must have been whiling
they must have been whiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not while
you must not while
she must not while
we must not while
you must not while
they must not while 	I must not be whiling
you must not be whiling
she must not be whiling
we must not be whiling
you must not be whiling
they must not be whiling	I must not have whiled
you must not have whiled
she must not have whiled
we must not have whiled
you must not have whiled
they must not have whiled	I must not have been whiling
you must not have been whiling
she must not have been whiling
we must not have been whiling
you must not have been whiling
they must not have been whiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I while?
must you while?
must she while?
must we while?
must you while?
must they while? 	must I be whiling?
must you be whiling?
must she be whiling?
must we be whiling?
must you be whiling?
must they be whiling? 	must I have whiled?
must you have whiled?
must she have whiled?
must we have whiled?
must you have whiled?
must they have whiled? 	must I have been whiling?
must you have been whiling?
must she have been whiling?
must we have been whiling?
must you have been whiling?
must they have been whiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not while?
must you not while?
must she not while?
must we not while?
must you not while?
must they not while? 	must I not be whiling?
must you not be whiling?
must she not be whiling?
must we not be whiling?
must you not be whiling?
must they not be whiling? 	must I not have whiled?
must you not have whiled?
must she not have whiled?
must we not have whiled?
must you not have whiled?
must they not have whiled? 	must I not have been whiling?
must you not have been whiling?
must she not have been whiling?
must we not have been whiling?
must you not have been whiling?
must they not have been whiling?